u/Sea-Algae8693

Few Questions:

1. Any issues with an ambi lower on the FM-15 upper?
2. Any issues with the AS Design Arc-Fire FRTs on the FM-15 upper?
3. Planning to build it as a suppressed 300blk, anyone had success with a cheap gas block or should I just get an AGB?
4. Anyone know the interior dimension of the handguard? Wondering how short I can run the barrel with a Nomad-L tucked. I can also put a smaller 30 can on it.

Planned build list ($875 for the base parts, ~$1450 for the ergos/optics):

• FM-15 Upper Build Kit - $360
• Faxon 7.5" Gunner 300 BLK - $125
• SilencerCo SCO-15 Ambi Lower - $220
• AS Designs ARC-Fire FRT Trigger Kit - $130
• Pistol Length Gas+Block, and Lower Pins & Springs - $40
• Plan B A2 mount and Nomad-L or a new dedicated can - $1000

Ergonomics and Optics

• Driven Arms Co Ultralight Compact Grip (ULCG) - $32
• Emissary Handbrake - $35
• A3 Modular Folding Brace 6.25In straight arm - $190
• Vector Frenzy FA Red Dot on Vector Acro low riser - $200
• Midwest Industries backup irons - $170
• SMS Trinity, SF 300 with switch cap, and Unity Axon Sync - $800

I want it to fit in my 20" long "Nike Elite EasyOn" Team USA backpack (gRaY mAn)