KAC SR15/SR30 Slip Fit Magwell (SFM™)

$49.95$54.95

Coming Early Q3 2025

  • Low profile design, free of snag points, offers unobstructed manual of arms
  • Durable single piece nylon construction
  • Simplified hardware reduces potential failure points to effectively none
  • Ultralight construction: ~ 0.55 oz including hardware

Made in the USA – Full Lifetime Warranty

(1 customer review)
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Now for the SR15 and SR30 lowers from Knights Armament, we bring you our Slip Fit Magwell (SFM™)

Our tried and true attachment method, co-developed with Darq Industries, embraces simplicity, allowing our magwells to be comprised of only three pieces – the polymer “funnel”/magwell itself, one 4-40 socket head screw, and one threaded insert. This package offers a secure and reliable fit, while also keeping the overall weight right at .55 oz, making it nearly invisible on your weapon system until you utilize the 150%+ increased funnel size – all function, no fluff.

*only compatible with KAC SR15 and SR30 lower receivers. For Aero M4E1/BA Enhanced, please use this variant. For standard forged models, please use this one. For Radian ADAC, please use this one, and for ADM UIC/ADM4, please use this one. If you have any trouble when installing your SFM™ please contact us for assistance.

Please Note:

Due to the efficient attachment method, minimal torque is needed when tightening the screw. Simply tighten the screw until the split section begins to touch, then just shy of a 1/2 turn of the screw for final torquing.

Color

Black, FDE, ODG

  1. Justin (verified owner)

    Finally a proper flared magwell for my SR15!

    Fit and finish are phenomenal and install literally took all of a minute. The material feels more durable than other magwells I’ve tried on other guns too.

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