Well Pro WG13-3HPM MK18 MWS GBBR, Bronze RIS III

The Well Pro WG13-3HPM is a short gas blowback M4 with a bronze M-LOK handguard in Daniel Defense RIS III style on a black body. It is the modern successor to the quad-rail MK18 look: slimmer, lighter and with M-LOK slots instead of four fixed rails. Under the handguard sits Well Pro's MWS-based WG13 system with a lightweight nylon body.

According to retailer data, the handguard is CNC aluminium, and the outer barrel, buffer tube, flash hider and delta ring are metal, while the upper and lower are reinforced nylon. That gives a stiff handguard for mounting accessories while keeping the rifle light. The two-tone colour makes the 3HPM an obvious choice if you are building a modern SOF-inspired loadout.

WG13-3HPM – key features

The most important features:

• RIS III-style M-LOK in bronze: The handguard has a full-length Picatinny rail on top for optics and M-LOK slots for the rest of your accessories. Compared with a quad rail like the one on the sister model 3GPM, it is slimmer in the hand and lighter, because you only mount rail sections where you actually need them.
• Lightweight nylon body with metal where it matters: The upper and lower are reinforced nylon, which keeps the weight down, while the bolt, buffer, pins, magazine release, bolt catch and trigger group are metal. These are the parts that take the load with every shot, and here metal is clearly more durable than plastic.
• Hop-up adjusted from the top rail: The hop-up adjuster is accessible under the top rail, so you can correct the trajectory without opening the rifle. On many GBBRs you have to pull back the charging handle or split the upper and lower to reach the hop-up.
• Adjustable gas flow: The gas flow is regulated by a screw inside the bolt carrier assembly using the long hex key supplied. This lets you tune the rifle to site limits and to the season, as green gas behaves differently in heat and cold. Well quotes an adjustable velocity range of approx. 91–122 m/s.
• Genuine GBB recoil: The bolt cycles with every shot and gives the mechanical feedback an AEG cannot deliver. That makes the WG13 well suited to players who want to train real manipulation of an M4 system with bolt catch and magazine changes.

Maintenance and safety

• Use good-quality green gas and keep the magazine sealed: a few drops of silicone oil on the fill valve and seals at regular intervals extend their life.
• Gas loses pressure in the cold. Keep magazines warm on cold days, and adjust the gas flow rather than pushing the system with stronger gas.
• Lightly lubricate the bolt carrier and nozzle after use, and clean the inner barrel regularly to keep hop-up and accuracy consistent.
• Store the rifle with an empty magazine and always wear approved eye protection. Our workshop in Aulum, Denmark is happy to help with tuning and upgrading GBBRs.