- 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: 0.50 oz including hardware
Aero Precision M4E1/BA Enhanced Slip Fit Magwell (SFM™)
$49.95 – $54.95
The M4E1 Slip Fit Magwell (SFM) brings “extra flare” to your Aero Precision M4E1 and Ballistic Advantage Enhanced receivers, increasing the existing funnel of the receiver by approximately 170%. The unique slip fit attachment method, co-developed with Darq Industries, offers users a simplified one piece construction with reduced points of (potential) failure – it has been proven through years of use on our EPC9, personal M4E1 builds, and Darq’s standard forged lower variants. The hardware follows this simplified approach, consisting of one 4-40 socket head screw and one threaded insert, offering a secure and reliable fit while also keeping the overall weight right at 0.50 oz.
*only compatible with Aero M4E1 and Ballistic Advantage Enhanced lower receivers. For Radian ADAC, please use this variant. For standard forged models, 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.
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!
| Material | PA11 Nylon Polymer |
|---|---|
| Weight w/ Hardware | ~0.50 oz |
| Torque | – 3 in/lbs – Do not over-torque |
| Hardware Included | 1 x Hex Screw |
| Dimensions | Max Length: 3.37 in / 85.59 mm |
| Color | Black, FDE, ODG |
Add a review
Chris (verified owner) –
I was so shocked, I had to leave a review.
I just installed this magwell and the fitment is just insane. I was truly floored with the quality and detail compared to a different brand’s milspec magwell I purchased for another build.
The precision of the cuts around the lower and the smooth and flush transition from the Magwell to the existing metal on the lower are flawless.
Heck, the bolt ties touch before you even add the bolt. No force or squeezing together.
This is the magwell to buy, and knowing the amount of R&D they put into this product, trust me it’s worth it. 10/10
Andy –
I legit struggled with rifle reloads. Grabbed a DAC mag well and reloads are now a breeze. Easy install, no snag points, very durable and just looks like a natural part of the lower.