r/canadaguns • u/Mammoth_Attention_59 • Aug 03 '25

BCL MRX mags in Renegade

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As title suggests:

I bought some mags, but encountering the following:

  • bolt will not go forward
  • extremely tight in mag well

After comparing to pmags, it seems the spine of the MRX mag is higher.

Is it legal to mod these mags? Anyone have experience making this work?

I just wanna go pew pew with a 20 rounder lol

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u/Mammoth_Attention_59 Aug 03 '25

The mk2 Renegade was designed to accept the MRX magazines

I’ve seen people use them, and have seen people make posts about it

I’m more so after what those people did / advice on it to make it work

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u/ekso69 Aug 03 '25

Is your receiver a MK2? I would call MRA directly and ask Darren.

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u/Mammoth_Attention_59 Aug 03 '25

Correct

Yeah I’ll shoot them a call!

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u/[deleted] Aug 04 '25 edited Aug 19 '25

[deleted]

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u/Mammoth_Attention_59 Aug 04 '25

I figured it out - the back spine needs to match similar to a standard STANAG

Otherwise it engages the LRBHO

Someone also commented you could remove the LRBHO. So either option works!

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u/[deleted] Aug 04 '25

[deleted]

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u/Mammoth_Attention_59 Aug 04 '25

Modding the magazine this way doesn’t cause it to become a prohib device: 1. Magazine still works as intended for the rifle(s) it was designed for. I.e manual action rifles (which have no magazine capacity limit)

If you shave down the sides and now it fits a in a semi auto - big no no

The renegade has a modified mag well by design to fit these magazines

Long story short, both options are perfectly acceptable, I personally like the LRBHO, so I went with shaving the mag spine.

Feel free to pm me and I can send you a reference photo!