Looks like Bravo Company USA is even getting into the pistol lower act. As usual for BCM, their lowers are 7075 T6 aluminum and hard coat anodized. If you want one of the best mil-spec lowers out there that's properly built, you can't go wrong with BCM. The BCM Pistol Lower is also compatible with the SigTac SB15 Brace.

Looks like G&R Tactical has them in stock.


Specifications:


Machined from Aluminum Forgings 7075-T6
Hardcoat Anodizing: MIL-A-8625F, Type III, Class 2
BCM® Milspec 7075-T6 Pistol Receiver Extension (1.2” outside diameter. Fit the ATF compliant SigTac SB15 type pistol stabilizing brace. Works with carbine buffer and action springs.
Staked M4 Lock Nut
USGI H Buffer (1 USGI Tungsten, 2 Steel)
BCM Trigger Guard
Low Shelf for RDIAS installation
Low Shelf for Accuwedge use
Un-notched Hammer compatible with 9mm use
Fire Controls marked SAFE and SEMI