CNC aluminium HopUp chamber for M249 machine guns is made of a single piece of aluminum alloy 6061- T6 with red anodized finish. It is a material with high strength, and lightweight. Weight of the chamber is only 18,9 grams.

Chamber is compatible with the M249 series by manufactures: A&K, PJ, Classic Army, Echo1, Matrix. Optimal nozzle length is 21 - 21,5mm.

Basic characteristics:

• Made on high precision CNC machines. (chamber, adjusting ring, center ring)
• Better sealing.
• Durable body with red anodized coating.
• >Compatible with the stock plastic nozzle.
• Packing include 21.5mm CNC aluminium sealing nozzle. Thanks to modified construction it fit on stock A&K cylinder head.(Because A&K cylinder head is little bit wider. Diameter is somewhere between standard and NBU.)
• Nozzle from the packing also fit on standard (not NBU) cylinder heads.
• Chamber is fully compatible with the stock plastic nozzle. So nozzle replace is on customer decision and not condition for good chamber function. However, nozzle replacement may cause slightly better sealing and increase performance.
• Suitable for nozzles 21 - 21.5mm (tested on A&K M249)

Each packing includes:

• Brass center ring.
• POM pressing roller.
• Spare o-ring under adjusting ring.
• Aluminium nozzle.
• Durable HopUp bucking

These generally require a level of technical skill to fit properly so we do advise you have it fitted by a competent technician.

Any questions on compatibility, installation or if you would like one of our in house techs to fit the parts for you, please email us on [email protected] or call us on 01293 525880