AR Pistol Upper Build Kits — Multiple Calibers, Your Assembly
Daytona Tactical's unassembled AR pistol upper build kits let you build your own pistol upper in the caliber that fits your build — 5.56 NATO, 300 Blackout, 9mm, .22 LR, or 7.62x39. Choose your barrel length, handguard style, and finish, then assemble it yourself without paying for labor.
Every kit ships with a stripped upper receiver, barrel in M4 contour, free-float M-LOK or KeyMod handguard with barrel nut and mounting hardware, gas tube and low-profile pinned gas block, A2 flash hider with crush washer, mil-spec dust cover with hardware, and mil-spec forward assist with roll pin. BCG and charging handle are not included but available as add-on options on each product page — add them at the same time so everything ships together.
5.56 NATO kits are available in 7.5" and 10.5" barrel lengths. 300 Blackout, 9mm, .22 LR, and 7.62x39 configurations are available in select barrel lengths — see individual product pages for specs. All Cerakote-finished kits apply color to the barrel and handguard over Type III hard coat anodized aluminum on the upper receiver. Black anodized kits use Type III hard coat throughout.
AR Pistol Upper Build Kit — Frequently Asked Questions
Q: What calibers are available for AR pistol upper build kits?
Currently available in 5.56 NATO, 300 Blackout, 9mm, .22 LR, and 7.62x39. Barrel length and handguard options vary by caliber — check each product page for available configurations.
Q: What's included in an AR pistol upper build kit?
Stripped upper receiver, barrel, free-float M-LOK or KeyMod handguard with barrel nut and hardware, gas tube and low-profile pinned gas block, A2 flash hider with crush washer, mil-spec dust cover with hardware, and mil-spec forward assist with roll pin. BCG and charging handle are not included but available as add-ons.
Q: Do these kits include a bolt carrier group?
No. BCG and charging handle are sold separately and available as add-on options on each product page so you can add them to the same order.
Q: What's the difference between 7.5" and 10.5" AR pistol upper build kits?
The 7.5" produces the most compact pistol upper configuration — shorter overall length, easier to maneuver. The 10.5" adds muzzle velocity and a slightly longer sight radius. Both use a pistol-length gas system. Available barrel lengths vary by caliber.
Q: M-LOK vs KeyMod — which should I choose?
Both are free-float attachment systems. M-LOK is the current industry standard with the widest accessory support. KeyMod is the older standard — still fully supported for lights, foregrips, and sling mounts. Either works well on a pistol build.
Q: Are these unassembled upper kits compatible with any AR-15 lower?
Mil-spec 5.56 and 300 Blackout uppers are compatible with any standard AR-15 lower. 9mm uppers require a dedicated 9mm lower. 7.62x39 uppers require an AR-47 compatible lower. Check individual product pages for lower compatibility notes.
Q: What tools do I need to assemble an AR pistol upper build kit?
An upper vise block, barrel wrench, torque wrench, and standard AR armorer's tools. All components are precision-machined — no hand-fitting required.
Q: What Cerakote colors are available?
FDE, OD Green, Tungsten Grey, Blue Titanium, and Zombie Green. Black anodized is also available at a lower price point. Color availability varies by caliber and product.
