Standard Forged Slip Fit Magwell (SFM™)

– Estimated Re-Stock November 2024 –

The proven Slip Fit Magwell (SFM™) for your standard forged lowers

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.

*works with most standard forged sets. If yours isn’t a standard forged it likely will not work. We have personally tested fitment on Geissele Super Duty Lowers, Spikes, Anderson, Aero Precision AR15, and Diamondback, with end users running them on numerous additional platforms as well. For Aero M4E1/BA Enhanced, please use this variant. For Radian ADAC, please use this one. ADM, Griffin, LMT and other models are in the works, so keep an eye out if you run their lowers! 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.

For Cerakote variants (FDE and ODG), the high temps used in the coating process causes warpage on the polymer that is evident while not installed on a lower (the split point gap is increased as the long arms of the magwell “wishbone”). This is normal and does not effect function or installation other than having to squeeze the split point together with marginally increased force. If you have any concerns during installation, please contact us and we will make sure you are taken care of. Thank you!