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TNT Airsoft APS-X Hop-Up System KWA LM4 Gas Blowback Rifle Retrofit Kit (Length: 265mm)

ID: 24916 (BRL-TNT-APSX-KWAM4-Retro-265)
T-N.T. Studios859188249165KWA HOP-UP RETROFIT KIT 265mm24916
5.0 stars, based on 2 reviews
TNT Airsoft APS-X Hop-Up System KWA LM4 Gas Blowback Rifle Retrofit Kit (Length: 265mm)
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T-N.T. Studios



  • Ultra-durable CNC-machined aluminum construction
  • Enhances both the reliability and performance of your KWA gas rifle
  • Includes bucking, barrel, and complete hop-up unit
  • 6.03mm barrel is perfect for a wide range of use, from indoor CQB to large-scale MILSIM field play!

Manufacturer: TNT Airsoft


Barrel Length: 265mm
Compatibility: KWA LM4, PTS Mega Arms-Licensed AR10 & AR15, PTS Masada, & KWA TAR-21 Gas Blowback Airsoft Rifles
Material: CNC-Machined Aluminum Alloy
Package Includes: 1x APS-X Complete Hop-Up Unit, 1x T-Hop Bucking, 1x Precision Double I/D Air-Cushion Inner Barrel

About T-N.T. Studios

The T-N.T. vision has always been the same: to offer a better solution to all airsoft players. All T-N.T. Studio's products are cutting edge, patented products designed with extreme precision. Our mission has always been to improve the experience of all airsoft players.

2 Customer Reviews

(Write a review)

by Sergio M. on 09/07/2021
"I got one of these for my LM4-C after the stock hop failed after several years. The new unit is relatively easy to install and works very well. I thought that the stock gun shot very well and was accurate, but this upgraded unit leaves the stock hop very far behind. Accuracy and consistency are excellent, beyond what I expected. I would recommend anyone who has an LM4 based system to make this upgrade sooner rather than later as the performance is unreal.
by Juan B. on 06/28/2021
"Bought the 370mm kit for my PTS MASADA GBB. Easy install, practically replaces the original as if it was OEM. Green Gas range averaged over 450fps, and using co2 450fps mags it averaged closer to 500fps. I use the Masada for target practice at ranges varying from 25 - 35 yards with 6mm steel ball bearings, the tight bore helps prevent even these heavy rounds from just sliding out of the barrel. Would totally recommend it for small game hunting and target practice, for PVP, you might be fps restricted in some places.

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