Upper Receiver Builder Kit: Sons of Liberty Gun Works M89 + 16″ SPR Match Barrel, 223 Wylde

Build an accurate AR-15 complete upper receiver and save a little money in the process with this Drilled Armory 16″ SPR Builder Kit, featuring Sons of Liberty Gun Works’ 16″ precision SPR barrel chambered in 223 Wylde, 15″ M89 handguard, gas block, and A2 flash hider. A Forward Controls Design dimpled forward assist, Wilson Combat gas tube, and Magpul Enhanced Ejection Port Cover round out the components list.

This product comes unassembled. Included are all the parts you need to build a complete upper receiver. Bolt carrier group and charging handle are not included but can be added for a discounted price (please inquire). 

SOLGW 16″ SPR Barrel
At the heart of the 16″ SPR Builder Kit is the Sons of Liberty Gun Works precision SPR barrel. It is unquestionably the most accurate barrel they’ve ever offered. Characteristics of this barrel include: SPR contour, 5/8 x 24 threads at the muzzle, 416R stainless steel, black oxide coated, chambered in 223 Wylde, mid length gas system, polygonal rifled with a 3 groove, 1:7 twist bore.

Available in hard anodized Black finish, or with a cerakote finish in either Noveske Tiger Eye Brown or Moss (current lead time for Moss is 4-6 weeks).