{"reviews":[{"id":7178991,"locale":"en_US","rating":5,"title":"Mil Spec Nit","text":"Mil spec castle nut, have used cmmg over the years and no complaints.","textLength":69,"csFlag":false,"inappropriateFlag":false,"reviewedFlag":true,"autoModerated":true,"published":true,"incentivized":false,"upVotes":0,"downVotes":0,"orderId":"154071176","dimensions":[],"responses":[],"tags":[],"media":{"photo":[],"video":[],"audio":[]},"user":{"nickName":null,"firstName":"Default","lastName":"Scheels","emailAddress":"[email protected]","externalId":null,"city":null,"state":null,"country":null,"ageRange":null,"badge":null,"shopperProfiles":[]},"reviewedDate":"2025-09-07T12:04:13-04:00","purchaseDate":"2025-08-28T00:00:00-04:00","dateCreated":"2025-09-04T21:28:52-04:00","customData":[],"incentiveType":null,"campaign":null,"deviceFingerprint":null,"topics":[],"catalogItems":[{"sku":"852005-55CA9CB","title":"MK4 Receiver Extension Buffer Tube Lock Nut","url":"https://www.scheels.com/p/852005-55CA9CB","category":"ar-lower-part-kits","reviewCount":3,"ratingCount":3,"averageRating":4.3,"ratingBreakdown":{"1":0,"2":0,"3":1,"4":0,"5":2},"active":true,"attributes":[]}]},{"id":4143932,"locale":"en_US","rating":3,"title":"","text":"Good price","textLength":10,"csFlag":false,"inappropriateFlag":false,"reviewedFlag":true,"autoModerated":true,"published":true,"incentivized":false,"upVotes":0,"downVotes":1,"orderId":"25001221","dimensions":[],"responses":[],"tags":[],"media":{"photo":[],"video":[],"audio":[]},"user":{"nickName":null,"firstName":"Randy","lastName":"Shafer","emailAddress":"[email protected]","externalId":null,"city":null,"state":null,"country":null,"ageRange":null,"badge":null,"shopperProfiles":[]},"reviewedDate":"2025-07-18T14:09:08-04:00","purchaseDate":"2021-09-04T00:00:00-04:00","dateCreated":"2024-01-01T16:08:50-05:00","customData":[],"incentiveType":null,"campaign":null,"deviceFingerprint":null,"topics":[],"catalogItems":[{"sku":"852005-55CA9CB","title":"MK4 Receiver Extension Buffer Tube Lock Nut","url":"https://www.scheels.com/p/852005-55CA9CB","category":"ar-lower-part-kits","reviewCount":3,"ratingCount":3,"averageRating":4.3,"ratingBreakdown":{"1":0,"2":0,"3":1,"4":0,"5":2},"active":true,"attributes":[]}]},{"id":1240775,"locale":"en_US","rating":5,"title":"It’s spec and it works","text":"Does it’s job. Snug and to spec.","textLength":32,"csFlag":false,"inappropriateFlag":false,"reviewedFlag":true,"autoModerated":true,"published":true,"incentivized":false,"upVotes":1,"downVotes":0,"orderId":"24913499","dimensions":[],"responses":[],"tags":[],"media":{"photo":[],"video":[],"audio":[]},"user":{"nickName":null,"firstName":"Collin","lastName":"Gatewood","emailAddress":"[email protected]","externalId":null,"city":null,"state":null,"country":"US","ageRange":null,"badge":null,"shopperProfiles":[]},"reviewedDate":"2021-09-17T14:50:46-04:00","purchaseDate":"2021-08-20T00:00:00-04:00","dateCreated":"2021-09-16T21:14:19-04:00","customData":[],"incentiveType":null,"campaign":null,"deviceFingerprint":null,"topics":[],"catalogItems":[{"sku":"852005-55CA9CB","title":"MK4 Receiver Extension Buffer Tube Lock Nut","url":"https://www.scheels.com/p/852005-55CA9CB","category":"ar-lower-part-kits","reviewCount":3,"ratingCount":3,"averageRating":4.3,"ratingBreakdown":{"1":0,"2":0,"3":1,"4":0,"5":2},"active":true,"attributes":[]}]}],"offset":0,"limit":10,"total":3}"Full Description:\nThe CMMG Mk4 Receiver Extension Buffer Tube Lock Nut is a replacement part for MSR receiver extensions. This AR castle nut is built to meet military specifications to provide long-lasting and reliable quality. This buffer tube lock nut is great for repairing or building a lower receiver extension. Repair your tactical rifle with the CMMG Mk4 Receiver Extension Buffer Tube Lock Nut.\n\nFeatures:\n\u003cul>\n\u003cli>Can be used to repair AR15 or personal builds\u003c/li>\n\u003cli>Built to meet mil-spec\u003c/li>\n\u003c/ul>\n\n"
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