Terdapat sebuah proyek menjelang akhir perang, '''David High Velocity '''buatan Kanada yang menembakkan amunisi 2-pdr melalui meriam 6-pdr. Hal ini dimaksudkan untuk meningkatkan kecepatan luncur peluru. Sistem ini masih dikembangkan saat perang usai, dan programnya berhenti saat itu juga.
Pengembangan lainnya adalah meriam 2-pdr HV 'Pipsqueak', meriam pasca perang mengunakan kartrid 40x438R yang mulanya ditujukan untuk menjadi persenjataan utama mobil lapis baja Saladin untuk menggantikan mobil lapis baja AEC. Meriam ini dirancang untuk menembakkan peluru Armour-piercing discarding sabot (APDS) yang dapat mengimbangi penetrasi tembakan 'Littlejohn' sementara tetap bisa menembakkan peluru berdaya ledak tinggi (HE). Faktanya, performa meriam ini lebih baik, tembakan 1,295 m/s mampu menembus lapisan baja setebal 85 mm pada sudut 60 derajat dari jarak 900m. Pengembangan meriam ini ditinggalkan ketika peran Saladin lebih condong pada bantuan tembakan infanteri,dan sebuah meriam berkecepatan rendah 76 mm justru dipilih.
Salah satu kekurangan 2-pdr yang serius adalah ketiadaan peluru berdaya ledak tinggi, terutama ketika meram 2-pdr adalah meriam utama sebuah tank; hal ini sangat penting saat sebuah tank digunakan untuk menyokong infanteri, sehingga tank tersebut hanya memiliki senapan mesin sebagai kegunaan antipersonnel. Sebuah selongsong berdaya ledak tinggi untuk 2-pdr, tapi tidak pernah diproduksi.<ref name="Ian Hogg page 138-139">Ian Hogg, ''Tank Killing'', page 138-139, published 1996 by Sidgwick & Jackson {{ISBN|1-885119-40-2}}</ref>
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== Bacaan lanjutan ==
{{Cite web|url=http://www.quarry.nildram.co.uk/37-40mm.htm|title=37mm and 40mm guns in British service|last=Williams|first=A. G.|archive-url=https://www.webcitation.org/6IPSugSsj?url=http://www.quarry.nildram.co.uk/37-40mm.htm|archive-date=2013-07-26|dead-url=yes|access-date=18 November 2014}}{{Cite web|url=http://www.quarry.nildram.co.uk/37-40mm.htm|title=37mm and 40mm guns in British service|last=Williams|first=A. G.|archive-url=https://web.archive.org/web/20140421221344/http://www.quarry.nildram.co.uk/37-40mm.htm|archive-date=2014-04-21|dead-url=yes|access-date=18 November 2014}}{{Cite web|url=http://www.quarry.nildram.co.uk/37-40mm.htm|title=37mm and 40mm guns in British service|last=Williams|first=A. G.|archive-url=https://web.archive.org/web/20100227042942/http://www.quarry.nildram.co.uk/37-40mm.htm|archive-date=20142010-0402-2127|dead-url=yes|access-date=18 November 2014}}<div class="cx-template-editor-source-container" lang="en" dir="ltr" style="display: none;"><div class="cx-template-editor-source"><div class="cx-template-editor-title" title="Formats a citation to a website using the provided information such as URL and title. Used only for sources that are not correctly described by the specific citation templates for books, journals, news sources, etc.">Cite web</div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="url" class="cx-template-editor-param-key">URL</span><span data-key="url" title="The URL of the online location where the text of the publication can be found. Requires schemes of the type "http://..." or maybe even the protocol relative scheme "//..."" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="url" style="position: relative;"><nowiki>http://www.quarry.nildram.co.uk/37-40mm.htm</nowiki></div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="title" class="cx-template-editor-param-key">Title</span><span data-key="title" title="The title of the source page on the website; will display with quotation marks added. Usually found at the top of you web browser. Not the name of the website." class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="title" style="position: relative;">37mm and 40mm guns in British service</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="last" class="cx-template-editor-param-key">Last name</span><span data-key="last" title="The surname of the author; don't wikilink, use 'authorlink'; can suffix with a numeral to add additional authors" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="last" style="position: relative;">Williams</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="first" class="cx-template-editor-param-key">First name</span><span data-key="first" title="Given or first name, middle names, or initials of the author; don't wikilink, use 'authorlink'; can suffix with a numeral to add additional authors" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="first" style="position: relative;">A. G.</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="authors" class="cx-template-editor-param-key">Authors list</span><span data-key="authors" title="List of authors as a free form list. Use of this parameter is discouraged, "lastn" to "firstn" are preferable. Warning: do not use if last or any of its aliases are used." class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="authors" style="position: relative;">Williams</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="archive-url" class="cx-template-editor-param-key">Archive URL</span><span data-key="archive-url" title="The URL of an archived copy of a web page, if or in case the URL becomes unavailable; requires 'archive-date'" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="archive-url" style="position: relative;"></div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="archive-date" class="cx-template-editor-param-key">Archive date</span><span data-key="archive-date" title="Date when the original URL was archived; do not wikilink" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="archive-date" style="position: relative;">26 July 2013</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="dead-url" class="cx-template-editor-param-key">Dead URL</span><span data-key="dead-url" title="If set to 'no', the title display is adjusted; useful for when the URL is archived preemptively but still live" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="dead-url" style="position: relative;">yes</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="access-date" class="cx-template-editor-param-key">URL access date</span><span data-key="access-date" title="The full date when the original URL was accessed; do not wikilink" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="access-date" style="position: relative;">18 November 2014</div></div></div></div>{{Cite book|title=World War II Ballistics: Armor and Gunnery|last=Bird|first=Lorrin|last2=Lingston|first2=Robert|publisher=Overmatch Press|year=2001|location=Albany, NY USA|pages=60|oclc=71143143}}<div class="cx-template-editor-source-container" lang="en" dir="ltr" style="display: none;"><div class="cx-template-editor-source"><div class="cx-template-editor-title" title="Formats a citation to a website using the provided information such as URL and title. 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Usually found at the top of you web browser. Not the name of the website." class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="title" style="position: relative;">37mm and 40mm guns in British service</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="last" class="cx-template-editor-param-key">Last name</span><span data-key="last" title="The surname of the author; don't wikilink, use 'authorlink'; can suffix with a numeral to add additional authors" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="last" style="position: relative;">Williams</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="first" class="cx-template-editor-param-key">First name</span><span data-key="first" title="Given or first name, middle names, or initials of the author; don't wikilink, use 'authorlink'; can suffix with a numeral to add additional authors" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="first" style="position: relative;">A. G.</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="authors" class="cx-template-editor-param-key">Authors list</span><span data-key="authors" title="List of authors as a free form list. Use of this parameter is discouraged, "lastn" to "firstn" are preferable. Warning: do not use if last or any of its aliases are used." class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="authors" style="position: relative;">Williams</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="archive-url" class="cx-template-editor-param-key">Archive URL</span><span data-key="archive-url" title="The URL of an archived copy of a web page, if or in case the URL becomes unavailable; requires 'archive-date'" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="archive-url" style="position: relative;">https://web.archive.org/web/20140421221344/http://www.quarry.nildram.co.uk/37-40mm.htm</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="archive-date" class="cx-template-editor-param-key">Archive date</span><span data-key="archive-date" title="Date when the original URL was archived; do not wikilink" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="archive-date" style="position: relative;">26 July 2013</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="dead-url" class="cx-template-editor-param-key">Dead URL</span><span data-key="dead-url" title="If set to 'no', the title display is adjusted; useful for when the URL is archived preemptively but still live" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="dead-url" style="position: relative;">yes</div></div><div class="cx-template-editor-param"><div class="cx-template-editor-param-title"><span id="access-date" class="cx-template-editor-param-key">URL access date</span><span data-key="access-date" title="The full date when the original URL was accessed; do not wikilink" class="cx-template-editor-param-desc"></span></div><div class="cx-template-editor-param-value" data-key="access-date" style="position: relative;">18 November 2014</div></div></div></div>
== Pranala luar ==
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