![Bolt Base O-Ring - Large, for KWA LM4 PTR Bolt Base O-Ring - Large, for KWA LM4 PTR](https://cdn11.bigcommerce.com/s-yck5k/images/stencil/500x230/products/6340/133739/bolt-base-o-ring-large-for-kwa-lm4-ptr__18379.1720092327.jpg?c=2)
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LM4-PTR Bolt, Part #2 on parts list
Disclaimer: Not suitable for LM4D, LM4D Mlok, or the Radian Mode1 2022 updated version.
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