GunBuilderAI

AR-15 Build Guide

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13 component slots · 10 required · 3 optional.

Mechanical fitment scope — slot, category & build stage only.

#	Slot	Category	Build Stage
1	Lower receiver	receiver	Required
2	Upper receiver	receiver	Required
3	Barrel	barrel	Required
4	Handguard	furniture	Required
5	Bolt carrier group	fire control	Required
6	Charging handle	fire control	Required
7	Trigger group	fire control	Required
8	Buffer & buffer tube	recoil	Required
9	Stock	furniture	Required
10	Pistol grip	furniture	Required
11	Muzzle device	muzzle	Optional
12	Optic / sights	optics	Optional
13	Magazine	feeding	Optional