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Complete AR-15 5.7mm Upper Assembly transforms your AR into a powerhouse!
Turn standard AR-15 Rifle into a FNH 5.7 with a 16" barrel.Specs:
- Fits FN PS 90 top-mounted magazines (not included) for straight line, low-profile shooting, even prone
- Performance design ejects spent casings down the mag well, eliminating flying brass (and hot cases down shirt collars!)
- Upper receiver and rails are precisely milled from a solid block of 7075 T6 aircraft aluminum for years of service
- Rails accommodate any style of sighting system
- Barrel has flash hider
- Blow-back action, no gas system to get fouled. Easy maintenance.
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Please Note : Intended for use with carbine stocks and comes with a carbine (230g) buffer. An additional (233.5g) buffer is required for all "butt-stock" / A2 type lower receivers.