Our Colt lower is housing a Geissele SSA-E trigger, Mil-Spec parts kit, and A2 grip. Because the flat, aluminum trigger guards can be sharp, we added some tape to ease the pain. Radian Raptor charging handles have become standard in this industry, and while the actual URGI has a Geissele Airborne, we wanted to test this Raptor LT.

With the advent of the USASOC URGI, that quintessentially American silhouette has changed forever. The Geissele Super Modular Rail MK 16 handguard, hammer forged barrel, and mid-length gas system work in concert for a package that …

URG-I全称是 “改进型上机匣组（Upper Receiver Group, Improved）”，该项目是美国陆战特种作战司令部（USASOC）在2017年发起的一项对现役的 SOPMOD II 进行升级改造的招标计划。 该项目的出现，一方面是因为近些年来不再流行四面导轨的护木设计（详见我发表在其他平台的文章 《皮卡汀尼导轨与两种后来竞争者》），有一些士兵或单位会自己购置其他护木去更换丹尼尔防务公司（DD）的护木，如 TORY 的ALPHA，或Geissele的SMR MK4等等。 因此USASOC干脆 …

服役数量最多的是14.5英寸枪管版本的URG-I，已经基本在陆军特种部队和第75游骑兵团中代替了同长度Daniel Defense RIS II URG，10.3英寸版本换装较慢。 空军情况不明，但是已知至少有两个常规空军的救援中队和一个空军特种作战司令部的特种战术中队装备了URG-I。

With the advent of the USASOC URGI, that quintessentially American silhouette has changed forever. The Geissele Super Modular Rail MK16 handguard, hammer forged barrel, and mid-length gas system work in concert for a package that …

The Geissele USASOC 14.5" Improved Complete Upper receiver lets shooters put a custom take on the Upper Receiver Group Improved (URGI) being adopted by the United States Army Special Operations Command (USASOC) forces.

The URG-I stripped upper increases the capability of the platform, with the inclusion of the Geissele Super Modular Rail MK 16 handguard, cold hammer forged, chrome-lined barrel, and bomb-proofed mid-length gas system.

The URG-I complete upper receiver includes a 14.5" GOV profile, Hammer Forged, ChromolyV, Chrome-lined barrel, with a 1:7" twist and includes a Surefire 4 Prong SF4P Flash Hider. The 14.5" URG-I uses a mid-length gas system and utilizes a Super Compact Gas Block with bomb-proof installation for reliability and optimal performance.

The USASOC URGI is a near-clone of the upper receiver group currently in service with USASOC. SPECIFICATIONS: OVERALL LENGTH: 24 1/4" WEIGHT: 4 lbs 3 oz; CALIBER: 5.56MM; RECEIVER: Mil-Spec M4 Upper Receiver Assembly; BOLT CARRIER GROUP: Geissele Reliability Enhanced; RAIL: Geissele 13.5" SMR MK16, DDC