b**********y
发帖数: 7371 | 1 CMMG MOD4SA AR-15 stripped lower, RRA NM Trigger LPK
话说俺正要装介个下机匣，塞母母鸡的裸下机匣，啊啊诶的下机匣套件。。。
结果枪机和锤头的PIN插不进洞！ |
q**u
发帖数: 12289 | 2 还有这种事情？
【在 b**********y 的大作中提到】
: CMMG MOD4SA AR-15 stripped lower, RRA NM Trigger LPK
: 话说俺正要装介个下机匣，塞母母鸡的裸下机匣，啊啊诶的下机匣套件。。。
: 结果枪机和锤头的PIN插不进洞！
|
H****r
发帖数: 16240 | 3 是不是pin不匹配的问题？
不过印象里colt的才是这样啊，总之AR下机匣扳机组对应的洞好像有两种大小
相应要选合适的销钉
【在 q**u 的大作中提到】
: 还有这种事情？
|
q**u
发帖数: 12289 | 4 cmmg这个lower应该是mil-spec，不应该存在大小洞的问题
【在 H****r 的大作中提到】
: 是不是pin不匹配的问题？
: 不过印象里colt的才是这样啊，总之AR下机匣扳机组对应的洞好像有两种大小
: 相应要选合适的销钉
|
b**********y
发帖数: 7371 | 5 应该不是PIN尺寸的问题，同样的啊啊诶LPK装到YHM的裸下机匣，一点问题都木有阿
【在 H****r 的大作中提到】
: 是不是pin不匹配的问题？
: 不过印象里colt的才是这样啊，总之AR下机匣扳机组对应的洞好像有两种大小
: 相应要选合适的销钉
|
q**u
发帖数: 12289 | 6 hetzer说的是非标准下机匣，不是pin的问题，是洞的问题。不过你那个cmmg应该是mil
-spec，不存在这个问题。
【在 b**********y 的大作中提到】
: 应该不是PIN尺寸的问题，同样的啊啊诶LPK装到YHM的裸下机匣，一点问题都木有阿
|
H****r
发帖数: 16240 | 7 恩我觉得他可以拿游标卡尺先量一下看到底怎么回事
mil
【在 q**u 的大作中提到】
: hetzer说的是非标准下机匣，不是pin的问题，是洞的问题。不过你那个cmmg应该是mil
: -spec，不存在这个问题。
|
b**********y
发帖数: 7371 | 8 俺木有游标卡尺也，打中学实验课用过，N年没摸过鸟
【在 H****r 的大作中提到】
: 恩我觉得他可以拿游标卡尺先量一下看到底怎么回事
:
: mil
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w*********p
发帖数: 7230 | 9 满眼的，插，洞
【在 b**********y 的大作中提到】
: CMMG MOD4SA AR-15 stripped lower, RRA NM Trigger LPK
: 话说俺正要装介个下机匣，塞母母鸡的裸下机匣，啊啊诶的下机匣套件。。。
: 结果枪机和锤头的PIN插不进洞！
|
b**********y
发帖数: 7371 | 10 诶, 多好的孩子, 生让他师父给带毁鸟 -
介么严肃的学术讨论, 她只看见了介两个字, 还给歧义了
仰天长叹...
【在 w*********p 的大作中提到】
: 满眼的，插，洞
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|
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f****t
发帖数: 15913 | 11 which lower part kit are you using? Is it CMMG or something else?
I know RRA use larger pivot pin than other companies.
You can just order the pins online and try again.
Good luck
【在 b**********y 的大作中提到】
: CMMG MOD4SA AR-15 stripped lower, RRA NM Trigger LPK
: 话说俺正要装介个下机匣，塞母母鸡的裸下机匣，啊啊诶的下机匣套件。。。
: 结果枪机和锤头的PIN插不进洞！
|
b**********y
发帖数: 7371 | 12 It is RRA NM trigger LPK that I was installing.
I think the trigger and hammer pins of the NM trigger are slightly bigger
than normal pins, but it shld still fit into the mil-spec lower's holes. The
pins are designed so to eliminate possible "play" in the holes.
CMMG lower's trigger and hammer holes are tighter than the spec, I guess.
Switched to a YHM lower, installation was a breeze - everything fits, the
holes and pins, etc etc
Time to sell my CMMG lower... |
D******r
发帖数: 491 | 13 RRA pins are bigger than normal,designed this way to eliminate play.
CMMG holes are smaller than normal, designed this way to eliminate play.
Trying to insert RRA pin into a CMMG hole ......
Funny you blamed the hole immediately......
The
【在 b**********y 的大作中提到】
: It is RRA NM trigger LPK that I was installing.
: I think the trigger and hammer pins of the NM trigger are slightly bigger
: than normal pins, but it shld still fit into the mil-spec lower's holes. The
: pins are designed so to eliminate possible "play" in the holes.
: CMMG lower's trigger and hammer holes are tighter than the spec, I guess.
: Switched to a YHM lower, installation was a breeze - everything fits, the
: holes and pins, etc etc
: Time to sell my CMMG lower...
|
q**u
发帖数: 12289 | 14 赞，又长学问了。还有哪些lower/lpk有类似问题？
【在 D******r 的大作中提到】
: RRA pins are bigger than normal,designed this way to eliminate play.
: CMMG holes are smaller than normal, designed this way to eliminate play.
: Trying to insert RRA pin into a CMMG hole ......
: Funny you blamed the hole immediately......
:
: The
|
H****r
发帖数: 16240 | 15 哈哈
【在 D******r 的大作中提到】
: RRA pins are bigger than normal,designed this way to eliminate play.
: CMMG holes are smaller than normal, designed this way to eliminate play.
: Trying to insert RRA pin into a CMMG hole ......
: Funny you blamed the hole immediately......
:
: The
|
w*********p
发帖数: 7230 | 16 说明一个道理，外F老黑是行不通的，紧不一定就好，大小合适最重要
【在 D******r 的大作中提到】
: RRA pins are bigger than normal,designed this way to eliminate play.
: CMMG holes are smaller than normal, designed this way to eliminate play.
: Trying to insert RRA pin into a CMMG hole ......
: Funny you blamed the hole immediately......
:
: The
|
b**********y
发帖数: 7371 | 17 Well, I immediately switched to a YHM stripped lower and the RRA NM trigger
LPK installed without a single issue, after I had not been able to insert
the pins into the CMMG lower even with a mallet to tap.
Both are touting mil-spec, so one of them is NOT. It is much logical to
regard the CMMG as the culprit. Plus, there have been concerns on QC issues
arised in CMMG manufacturing in recently timeframes.
I will get a DPMS LPK to see if their holes are GTG or otherwise.
【在 D******r 的大作中提到】
: RRA pins are bigger than normal,designed this way to eliminate play.
: CMMG holes are smaller than normal, designed this way to eliminate play.
: Trying to insert RRA pin into a CMMG hole ......
: Funny you blamed the hole immediately......
:
: The
|
b**********y
发帖数: 7371 | 18 介个不试试系不计道地
问题尼，就怕试一试就整出麻烦
所以浑多同学就只在岸边站着，灌灌水，又不敢湿鞋
系不系啊， W同学？
【在 w*********p 的大作中提到】
: 说明一个道理，外F老黑是行不通的，紧不一定就好，大小合适最重要
|
w*********p
发帖数: 7230 | 19 那要问我师傅了，我师傅和非洲黑妹妹有一腿
【在 b**********y 的大作中提到】
: 介个不试试系不计道地
: 问题尼，就怕试一试就整出麻烦
: 所以浑多同学就只在岸边站着，灌灌水，又不敢湿鞋
: 系不系啊， W同学？
|
D******r
发帖数: 491 | 20 It's more likely that both the hole and pin has the same nominal dimension,
both are to the mil-spec, but are manufactured to different tolerance. So
you are having issue trying to assemble them.
trigger
issues
【在 b**********y 的大作中提到】
: Well, I immediately switched to a YHM stripped lower and the RRA NM trigger
: LPK installed without a single issue, after I had not been able to insert
: the pins into the CMMG lower even with a mallet to tap.
: Both are touting mil-spec, so one of them is NOT. It is much logical to
: regard the CMMG as the culprit. Plus, there have been concerns on QC issues
: arised in CMMG manufacturing in recently timeframes.
: I will get a DPMS LPK to see if their holes are GTG or otherwise.
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b**********y
发帖数: 7371 | 21 恩, 你西傅DIVERSITY很好很强
你了也不能给俺们丢脸, 唔, 那就来个三色三人行!
好好干, W同学
【在 w*********p 的大作中提到】
: 那要问我师傅了，我师傅和非洲黑妹妹有一腿
|
b**********y
发帖数: 7371 | 22 Well, got a DPMS LPK, and it installed OK with no major issue, into the CMMG
stripped lower.
Observations are the CMMG seems to be built with tighter tolerance per MIL-
spec. The trigger and hammer were barely pushed into place, and bolt catcher
roll pin was tough to drive in. Otherwise, it seems to work, and function
well.
So lessons learnt, be really careful to mix and match LPK and lowers from
diff manufacturers.
Thanks for the excellent insights and feedback here.
Muchas gracias
trigger
iss
【在 b**********y 的大作中提到】
: Well, I immediately switched to a YHM stripped lower and the RRA NM trigger
: LPK installed without a single issue, after I had not been able to insert
: the pins into the CMMG lower even with a mallet to tap.
: Both are touting mil-spec, so one of them is NOT. It is much logical to
: regard the CMMG as the culprit. Plus, there have been concerns on QC issues
: arised in CMMG manufacturing in recently timeframes.
: I will get a DPMS LPK to see if their holes are GTG or otherwise.
|
q**u
发帖数: 12289 | 23 你这杆打算装成什么样的？
CMMG
catcher
【在 b**********y 的大作中提到】
: Well, got a DPMS LPK, and it installed OK with no major issue, into the CMMG
: stripped lower.
: Observations are the CMMG seems to be built with tighter tolerance per MIL-
: spec. The trigger and hammer were barely pushed into place, and bolt catcher
: roll pin was tough to drive in. Otherwise, it seems to work, and function
: well.
: So lessons learnt, be really careful to mix and match LPK and lowers from
: diff manufacturers.
: Thanks for the excellent insights and feedback here.
: Muchas gracias
|
b**********y
发帖数: 7371 | 24 整了BRAVOCOMPANY的那个DDM4，Daniel Defense的卡宾upper带12寸战术导轨
俺的AR-15项目就以它画个句号吧
【在 q**u 的大作中提到】
: 你这杆打算装成什么样的？
:
: CMMG
: catcher
|
q**u
发帖数: 12289 | 25 good。装好了上照片。
【在 b**********y 的大作中提到】
: 整了BRAVOCOMPANY的那个DDM4，Daniel Defense的卡宾upper带12寸战术导轨
: 俺的AR-15项目就以它画个句号吧
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