Minimalist stock designs look sharp and run light, but they quickly run into problems when paired with modern airsoft setups. If your rifle?s buffer tube houses an inline MOSFET, micro-fuse, or a recoil mechanical unit, standard slim stock pads leave zero room to drop in an 11.1V stick battery. The PTS? Extended Battery Storage Butt Pad for EPS-C is engineered as a direct solution to that exact problem, expanding the battery envelope without ruining the slim ergonomics of your rifle.

By extending the internal cavity, this pad unlocks a 105 x 20 x 15mm storage compartment within the butt plate itself, offering ample housing for buffer-tube style LiPo batteries while maintaining a streamlined rear profile. Its integrated battery expansion cavity is tailored to fit standard 11.1V buffer tube LiPo stick batteries, giving slim-stock users a practical way to keep their preferred power source on board.

The pad is purpose-built for platform configurations with occupied buffer tubes, including Tokyo Marui Next Gen Recoil Systems (NGRS) and KWA ERG / AEG 3.0/3.0+ builds. It solves recoil and MOSFET space constraints by providing the clearance needed when kinetic recoil engines occupy the primary buffer tube lumen. For custom MOSFET and rear-wired AEGs, it also helps prevent wire pinching and battery crush on tight rear-wired electric airsoft rifles.

Durability and handling are central to the design. The butt pad is crafted from ultra-durable DuPont? Zytel? reinforced polymer fused with a high-friction rubber traction plate to absorb impacts and harsh field use. Its angled anti-slip rubber face features a sloped profile and textured tread, allowing smooth shoulder mounting off plate carriers without snagging on tactical nylon.

As a drop-in upgrade, the PTS? Extended Battery Storage Butt Pad snaps onto the PTS? EPS-C (Enhanced Polymer Stock - Compact) housing in seconds with no permanent modification required. It is part of the PTS EP Series? and is finished in black. The internal battery bay measures approximately 105 x 20 x 15mm, while the external dimensions are approximately 130 x 42 x 30mm. It weighs approximately 50g and is designed for fitment with the PTS? EPS-C Stock only.

For Tokyo Marui NGRS and KWA ERG builds, this pad provides the exact clearance needed when kinetic recoil engines occupy the primary buffer tube lumen. For custom MOSFET and rear-wired AEGs, it prevents wire pinching and battery crush on tight rear-wired electric airsoft rifles. In short, the PTS? Extended Battery Storage Butt Pad for EPS-C keeps the sharp, lightweight feel of a minimalist stock while finally giving modern airsoft electronics and batteries the room they need.

Key Feature

• Solves battery space issues on slim minimalist stocks.

• Adds an internal 105 x 20 x 15mm battery bay.

• Fits standard 11.1V buffer-tube LiPo stick batteries.

• Ideal for occupied buffer tubes with MOSFET, fuse, or recoil units.

• Compatible with Tokyo Marui NGRS and KWA ERG / AEG 3.0/3.0+.

• Helps prevent wire pinching and battery crush on rear-wired AEGs.

• Made from DuPont? Zytel? reinforced polymer with rubber traction plate.

• Angled anti-slip rubber face for smooth shoulder mounting.

• Drop-in fit for PTS? EPS-C stock only; no permanent modification.

• Specs: Black, approx. 130 x 42 x 30mm, approx. 50g.