SLR Rifleworks

SLR Rifleworks Magwell Glock 20/40 Gen 4


SLR Rifleworks Magwell fits the Glock G120/40 Gen4 model magwell.  It is specific to this model.

  • Gen 4 G20/40 Magwell Adapter
  • Fits Gen 4 Glock 20 and Glock 40 10mm pistols 
  • Fits Gen 4 Glock 21 and Glock 41 .45ACP Pistols
  • For SF versions only
  • Machined from 7075 Billet Aluminum
  • Includes ultra low-profile billet attachment screw
  • Made to fit model like a glove. No "one size fits all" like many out there
  • Does not work with TT extensions currently unless pin on extension is shortened.
  • Will work with 10-round mags (for states with capacity restrictions)
  • Will not work with back straps
  • Magwell screw only needs to be finger tight.
  • Do Not Overtighten.
  • NOTE- install over front lip of grip before pushing rear into place.


Online Orders will ship out between 1-3 business days. Parcels are shipped via Canada Post and only to Canadian addresses. All parcels will have tracking info and will require a signature upon delivery.

For those residing in Remote Locations (Air Only Destinations) please select "Air-Only" shipping option and we will contact you directly with a shipping quotation.

30 Day Refund or Exchanges

Should the items you purchased not meet your expectations, you may return or exchange them within 30 days of the original date of purchase. This can be done by shipping the item back or by bringing the item to our shop (by appointment only).

Items can only be returned if they meet the following criteria:

  • New and Unused
  • Original packaging intact

This policy excludes certain items. Items such as:

  • Firearms of any kind

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