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Rw Double Eagle
M917G UTR45

Pistol caliber M4? It is not the first one we hold in our hands and even so they are still not so common in airsoft, could that be why we like them so much? In this case, Taiwangun invites us to discover this Double Eagle M817G UTR45. Oh! You thought its was an UMP, well, think again, it's the M89A, this replica is part of the UTR, SMG (submachine gun) versions of an AR (yes, an M4) from Double Eagle. What do you think? 


The compactness and lightness of this submachine gun is not only due to its size, but the use of reinforced nylon in the upper and lower receivers, the stock and the handguard, allows the manufacturer to reduce the weight of the replica to only 2.5 kg , something very difficult if it were manufactured in any metal alloy.


The design of the handguard offers a reduced profile, which allows a more comfortable grip, but in which we can still attach the Picatinny rails that are included with screws (so as not to have to give up the accessories that we like to carry) or the hand stopper which is also included in the box. Another part that comes separately is the loading lever handle that can be mounted on either side and will help us keep the ejection port open to regulate the hop up until we activate the boltcatch release.

Pistol grip

The design of the pistol grip is reminiscent of the Magpul MOE due to its buttstock, but, among other differences, it includes non-slip rubber surfaces. Another of the accessories included in the standard replica is a piece with which to replace the magazine release lever with a redesigned piece that allows us to activate it from the trigger guard in an ambidextrous way, facilitating quick reloads. The shot selector lever is also ambidextrous, although on the right side it is somewhat shorter to be less bothersome when the grip is made with the right hand, as is the case in most cases.


The shape of the stock reminds us of the SCAR Adaptable Stock System. In this case we have a telescopic adjustable stock with 6 positions, with an adjustable cheek rest and which folds outwards (it covers the ejection port, something that it could not do if it were a real model because it would not be able to eject the shells). 

When folded, the cable with T-Dean termination is exposed (although in the box we found an adapter from TDean to Tamiya) for the battery, for which we have a large space. The stock has both a QD hitch and a washer to pass the strap directly.

Internal parts

This replica has a version 2 gearbox, typical of the M4, with four bushings and two 8 mm bearings with steel balls for the third axis. The gears have been made of steel, although they lack markings. This gearbox comes with a quick spring change so we will not have to open it to access the steel spring guide with bearings to achieve better spring torsion, especially when shooting in full auto, although we do not find bearings inside the piston head to support torque from the other end. 

The piston, like the piston head, is made of polymer with 3 metal teeth so that it does not wear out as quickly. The cylinder is made of steel and is ventilated to be able to adjust the amount of air that is compressed in each shot. The cylinder head is made of polymer, which helps to soften the knock that occurs with each shot with the piston head, which we will also say that it achieves a great seal. The nozzle is also made of polymer, and is inserted into a hop-up chamber also made of polymer, with a thread design similar to that of Umarex. 

The barrel that comes as standard is made of brass, measures 240 mm and has an internal diameter of 6.08 mm, with an “air cushion” type design according to the manufacturer, which allows it to stabilize the Bbs and increase their rotation in the barrel, improving thus the range and accuracy of the replica. It also includes the Falcon electronic control system that allows us to program the fire mode (double shot, semi, bursts of 1-5 bbs, or full auto), adjust the sensitivity of the trigger in three levels, and protect the motor and battery against possible contingencies. When testing it with 0.20 g BBs, it has given us an average of 335 FPS and an ROF (rate of fire) of 950 BBs per minute.


Although this model is based on an AR adapted to straight submachine gun magazines (yes, it also reminds us more of a UMP than an M4), it definitely offers us a replica with an appearance that will be totally different from what that we see on the playing fields. And on a practical level, a very light and compact replica, with 120 BBs midcap magazines that fits us like a glove when moving through the narrowest parts of a CQB.