IMI Defense KIDON K18 PDW Conversion Kit for Polymer 80 Frames& Beretta APX
IMI Defense KIDON K18 PDW Conversion Kit, Non-NFA — Polymer80 Frames & Beretta APX
So you want to turn your Polymer80 or Beretta APX into a stable, rail-equipped PDW platform without NFA paperwork. This kit gets you there. The IMI Defense KIDON K18, non-NFA version — no stock, no SBR registration required. Ambidextrous. Picatinny rails at 12, 3, 6, and 9 o’clock. Made in Israel. Tested to 15,000 rounds of 9mm.
IMI Defense KIDON K18 PDW Conversion Kit for Polymer 80 Frames& Beretta APX This is the US-legal configuration of the KIDON system, specifically without the shoulder stock. First, IMI Defense specifically developed this version for the US market to avoid NFA SBR classification. Next, the K18 adapter is the specific insert that makes this kit compatible with Polymer80 frames and the Beretta APX. Finally, the overall system still gives you dramatically improved stability, full rail coverage, flip-up backup sights, and a shock absorber just without the folding stock that would require NFA registration.
Does this kit require NFA paperwork or SBR registration?
IMI Defense KIDON K18 PDW Conversion Kit for Polymer 80 Frames& Beretta APX No this is the specific non-NFA version. So IMI Defense’s stock-equipped KIDON is not available in the US due to NFA regulations. Also, this version ships without the shoulder stock, which is what creates the SBR classification under federal law. Therefore, you can purchase and use this kit without a Form 4 tax stamp or SBR registration.
What Polymer80 frames does the K18 adapter fit?
IMI Defense KIDON K18 PDW Conversion Kit for Polymer 80 Frames& Beretta APX Five specific configurations. So the K18 adapter fits the PF940v2 Standard, PF940Cv1 Compact, PF940CL Compact Long Frame, PFC9 Compact Pistol Frame (serialized), and PFS9 Standard Pistol Frame (serialized). Also, this same K18 adapter fits the Beretta APX, giving you two distinct pistol families from one adapter. Therefore, if you’re building on any of these Polymer80 configurations or own an APX, you’re covered with the K18.
What rail positions does this IMI Defense KIDON K18 PDW Conversion Kit for Polymer 80 Frames& Beretta APXprovide?
Full four-sided Picatinny coverage. So the KIDON chassis provides MIL-STD 1913 Picatinny rails at 12, 3, 6, and 9 o’clock. Also, the kit ships with flip-up backup iron sights front and rear, so you have a usable sighting system immediately. Therefore, you can mount optics, lights, lasers, and a foregrip simultaneously without sourcing additional rail hardware.
How well has this system been tested?
IMI Defense KIDON K18 PDW Conversion Kit for Polymer 80 Frames& Beretta APX 15,000 rounds of 9mm and 5,000 rounds of .45 ACP without issues. So IMI Defense conducted live-fire testing in Israel under real operational conditions before releasing the KIDON commercially. Also, the system was tested in snow, water, dust, and mud. Therefore, this isn’t a range toy it’s a platform that was developed for and proven by military and tactical teams worldwide.
Who is this IMI Defense KIDON K18 PDW Conversion Kit for Polymer 80 Frames& Beretta APXbest for?
This IMI Defense KIDON K18 PDW Conversion Kit for Polymer 80 Frames& Beretta APX fits Polymer80 and Beretta APX owners who want a stable, shoulder-brace-free PDW configuration without any NFA paperwork. So if you want full rail coverage, shock absorption, and dramatically improved stability over a handheld pistol — without registering an SBR this kit delivers exactly that. Also good for competitive shooters who want a more stable platform for their Polymer80 build.
Specs Table
| Spec | Detail |
|---|---|
| Adapter | K18 (Polymer80 frames + Beretta APX) |
| Compatible Polymer80 Frames | PF940v2, PF940Cv1, PF940CL, PFC9 (serialized), PFS9 (serialized) |
| Also Compatible With | Beretta APX |
| NFA Required | No — non-stock version specifically for US market |
| Rail Coverage | Picatinny at 12, 3, 6, 9 o’clock |
| Sights | Flip-up backup iron sights, front and rear, included |
| Recoil System | Smart Shock Absorber built into rear of chassis |
| Orientation | Ambidextrous |
| Testing | 15,000 rounds 9mm / 5,000 rounds .45 ACP, snow/water/dust/mud |
| Kit Weight | Approx. 1,500g (full system) |
| Material | Reinforced polymer with metal insert reinforcements and heat shields |
| Manufacturer | IMI Defense, Israel |
| Best For | Home defense, range training, PDW builds, Polymer80 owners |
| Price | $550 |
FAQ
Does this IMI Defense KIDON K18 PDW Conversion Kit for Polymer 80 Frames& Beretta APXrequire SBR registration or a Form 4 tax stamp? No. This is the non-NFA, no-stock version specifically developed for the US market. No NFA paperwork required.
Will the stock-equipped KIDON version work in the US? Not legally without prior SBR registration. IMI Defense explicitly states the stock version is not available to US residents due to NFA regulations.
What’s the difference between this and the stock-equipped KIDON? This version has no shoulder stock. The stock version creates an SBR under federal law and requires NFA Form 4 registration before use in the US.
Does the K18 fit all Polymer80 frames? It fits PF940v2, PF940Cv1, PF940CL, PFC9, and PFS9 specifically. Verify your exact Polymer80 frame model before ordering.
Does this kit fit the Beretta APX Full Size and Compact? Yes. The K18 adapter is confirmed compatible with the Beretta APX.
Can I add a stock to this kit later? Only if you first register your pistol as an SBR with ATF and complete the Form 4 process. Never add a shoulder stock without prior NFA registration.
How does the KIDON attach to the pistol? The pistol slides into the chassis from the rear, secured by a locking mechanism. The pistol must have a factory-made accessory rail for proper fitment.
Find more IMI Defense KIDON conversion kits and PDW accessories at gunpartspalace.com.
