Description
The Battle Arms Development 3-Piece Enhanced Lower Parts Kit bundles the three lower controls your hands actually touch during a stage: the bolt catch, the magazine catch, and the safety selector. Each one is BAD’s enhanced version of the mil-spec part. The bolt catch has a raised T-shaped heel and diagonal serrations so your thumb gets a positive purchase, the mag catch is fluted to shave weight, and the safety is a single-sided 90 degree lever with a cleaner shape than the stock one.
All three parts are investment cast from 8620 steel, heat treated, and finished in black phosphate. They drop into any mil-spec dimensioned AR-15 lower and reuse your existing springs, detents, and pins. BAD says the bolt catch clears the Norgon Ambi-Catch and the mag catch works with mil-spec release buttons. This is not a full LPK. You still need a trigger group, pivot and takedown pins, detents, springs, trigger guard, and grip. Made in the USA.
Specs
- Material: 8620 investment cast steel, heat treated
- Finish: Black phosphate
- Includes: Enhanced Bolt Catch (BAD-EBC-IC), Enhanced Magazine Catch (BAD-EMC-IC), Enhanced Single-Sided Safety Selector (BAD-E4S-IC)
- Safety throw: 90 degree, single sided
- Weight: Bolt catch 0.39 oz, magazine catch 0.25 oz
- Fits: Mil-spec dimensioned AR-15 lower receivers
- Made in: USA
Who it’s for
AR builders who are buying a full lower parts kit anyway and want to swap the three cheap cast controls for better ones in one purchase, without paying for a boutique ambi setup.
Who should skip it
The safety is single sided and 90 degree only. If you want an ambi or short-throw safety, buy the BAD-ASS PRO we carry instead and pick up the bolt catch and mag catch separately. If you need a complete LPK with a trigger and pins, this is only three parts of it.




