The AR-57, also known as the AR Five Seven, is available as either an upper receiver for the AR-15/M16 rifle or a complete rifle, firing 5.7×28mm rounds from standard FN P90 magazines. [3] …

AR-57 是由 美國 AR57公司（前稱：萊茵蘭武器公司）為 AR-15 樣式武器研製及生產的上機匣， [1]，配合原來的AR-15／ M16 下機匣就可變成一款發射 比利時 國營赫斯塔爾 研製的 5.7×28 …

The AR-57 is a cutting-edge weapon that is quickly gaining popularity among military and law enforcement agencies around the world. This unique rifle is designed to be the ultimate tool for …

The AR57 (also known as the AR Five Seven) upper receiver for the AR-15 has two claims to fame: a 50-shot capacity and downward ejection for ambidextrous operation. Operating by …

New AR Five Seven 5.7x28 caliber Rifle. Accepts FNH magazines. Semi Auto bolt, New ergonomic design custom grip with battery and accessory compartment (holds 2 CR123's), Mil …

2024年3月19日 · The AR57 is an AR15 profile rifle chambered in 5.7x28mm. Many versions will accept a standard FN P90 magazine, though it’s possible there are some that take a …

AR57 ULT Upper Receiver 5.7x28MM. This upper receiver is chambered in 5.7x28mm and features a steel 16" barrel with 1:8.5" twist and a 1/2x28 thread pattern. This AR57 Upper is …

Panzer Arms AR57 Ultra Light Tactical 5.7x28mm Upper is a complete upper receiver that converts any mil-spec AR-15 lower to shoot 5.7x28mm ammunition. This alloy monobloc …

2024年2月28日 · Designed to transform any AR-15 lower into a 5.7×28 firearm, this upper assembly offers exceptional functionality and performance. In this review, I will discuss its …

Panzer Arms AR57 Complete ULT M-LOK Upper Receiver with a 12-Inch Lightweight Barrel, This AR57 Upper Receiver Assembly converts any AR-15 Lower to a Rifle Capable of Shooting …